Data/hora: 22/06/2024 04:12:35

Biblioteca(s): 	Embrapa Arroz e Feijão.	
Data corrente: 	04/11/2022	
Data da última atualização: 	04/11/2022	
Autoria: 	CARVALHO, J. C. B. de; CHAIBUB, A. A.; SOUSA, K. C. I.; BRITO, D. C. de; FILIPPI, M. C. C. de; ARAÚJO, L. G. de.	
Afiliação: 	JACQUELINE CAMPOS BORBA DE CARVALHO, UNIVERSIDADE FEDERAL DE GOIÁS; AMANDA ABDALLAH CHAIBUB, UNIVERSIDADE FEDERAL DE GOIÁS; KELLEN CRISTHINA INÁCIO SOUSA, UNIVERSIDADE FEDERAL DE GOIÁS; DENISE CANDINI DE BRITO, UNIVERSIDADE FEDERAL DE GOIÁS; MARTA CRISTINA CORSI DE FILIPPI, CNPAF; LEILA GARCES DE ARAUJO, UNIVERSIDADE FEDERAL DE GOIÁS.	
Título: 	Efficiency of a new Waitea circinata extract against rice pathogens.	
Ano de publicação: 	2021	
Fonte/Imprenta: 	Pesquisa Agropecuária Tropical, v. 51, e66916, 2021.	
ISSN: 	1983-4063	
DOI: 	https://doi.org/10.1590/1983-40632021v5166916	
Idioma: 	Inglês	
Conteúdo: 	Waitea circinata (Warcup & Talbot) is an orchid antagonist mycorrhizal fungus with biocontrol potential against rice pathogens. This study aimed to optimize the extraction method, obtain a new extract and evaluate its efficiency against rice pathogens in vitro and in vivo, as well as to compare it with other extraction methods and W. circinata. The extracts were obtained and screened for in vitro growth inhibition against the pathogens Cochliobolus miyabeanus, Monographella albescens and Sarocladium oryzae, using the following extracts: mycelial, crude, lyophilized and mycelial mass. An additional in vitro assay was performed with the principal rice pathogen (Magnaporthe oryzae), in order to evaluate the conidial germination and appressorium formation. Based on this evaluation, the lyophilized and mycelial mass extracts were tested in vivo against rice blast (M. oryzae) and compared to the W. circinata mycelial suspension, in different application forms (simultaneous and previous). The mycelial mass extract inhibited all the pathogens, and the crude and lyophilized extracts inhibited C. miyabeanus and M. albescens, respectively. The mycelial mass extract inhibited the M. oryzae conidial germination and appressorium formation by 80 %, and the simultaneous and previous applications suppressed the rice blast by 94 %. These results indicate that the new extract can be used to control rice pathogens.	
Palavras-Chave: 	Biocontrol; Biocontrole; Waitea circinata.	
Thesagro: 	Arroz; Brusone; Escaldadura; Fungo; Mancha Parda; Podridão.	
Thesaurus Nal: 	Blast disease; Fungal brown spot; Rice.	
Categoria do assunto: 	H Saúde e Patologia	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1148055/1/pat-2021.pdf	
Registro original: 	Embrapa Arroz e Feijão (CNPAF)	
Exemplares: 	CNPAF - (36542-1) - UPC - AP - DD - 2021 -  - 2021 - DIS